The uptake of resources from the environment is a vital process for all organisms. Many experimental studies have revealed that the rate at which this process occurs depends critically on the resource concentration, a relationship called ‘‘functional response.’’ However, whether the concentration of the consumer normally affects the functional response has been the subject of a long-standing, p...

This paper presents the multiple criteria modeling for an Information Technology decision problem. There are presented two multiple criteria models to evaluate different alternatives for the implementation of one Enterprise Resources Planning module. The first model was developed with the Analytic Hierarchy Process. From this model, the Analytic Network Process was applied in order to include t...

We introduce a dynamic market share attraction model where agents are boundedly rational. They follow a simple rule of thumb which is based on marginal profits to determine their actions over time. We show that multistability arises, i.e. several attractors coexist. In such a situation the selected long run state becomes path-dependent, and a thorough knowledge of the basins and their structure...

Human society affects environmental change but is also vulnerable to these changes. This relation has generated a number of theories that either focus on how we affect the environment or how the environment affects us. Few theories explicitly focus on the interaction. This paper will establish the range of data required to give an assessment of how likely an ecosystem is to change (which we lab...

In Demography and modelling mortality (or failure) data the univariate Makeham-Gompertz is well-known for its extension of exponential distribution. Here, a bivariate class of Gompertz--Makeham distribution is constructed based on random number of extremal events. Some reliability properties such as ageing intensity, stress-strength based on competing risks are given. Also dependence properties...

Recent studies have shown that the fruitfly Drosophila exhibits behavioral sensitization in response to repeated exposure to cocaine; the exploitation of this genetically tractable model system for studying cocaine addiction is already providing new clues that may help understand the process of drug addiction in man.

A growing number of firms today have to cope with the twofold challenge of mass customization (i.e., combining high performance in product customization with high performance in cost, delivery and quality) and green management (i.e., integrating environmental-sustainability principles into businesses). Research on this joint challenge, however, is still limited in the literature. To narrow this...